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Dynamic simulation of non-spherical particulate suspensions

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Abstract

Particle-level simulation has been employed to investigate rheology and microstructure of non-spherical particulate suspensions in a simple shear flow. Non-spherical particles in Newtonian fluids are modeled as three-dimensional clusters of neutrally buoyant, non-Brownian spheres linked together by Hookean-type constraint force. Rotne–Prager correction to velocity disturbance has been employed to account for far-field hydrodynamic interactions. An isolated rod-like particle in simple shear flow exhibits a periodic orientation distribution, commonly referred to as Jeffery orbit. Lubrication-like repulsive potential between clusters have been included in simulation of rod-like suspensions at various aspect ratios over dilute to semi-dilute volume fractions. Shear viscosity evaluated by orientation distribution qualitatively agrees with one obtained by direct computation of shear stress.

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Acknowledgements

This work was supported in part by the Australian Research Council (Discovery Project no. DP0666004). The authors are grateful for helpful comments by Prof. Roger I. Tanner, Prof. Xijun Fan, Dr. Clint Joung, and Mr. Erwan Bertevas.

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Authors and Affiliations

  1. School of Chemical and Biomolecular Engineering, University of Sydney, Sydney, New South Wales, 2006, Australia

    Prakorn Kittipoomwong & Howard See

  2. Faculty of Engineering and Surveying, University of Southern Queensland, Toowoomba, Queensland, 4350, Australia

    Nam Mai-Duy

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  1. Prakorn Kittipoomwong
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  2. Howard See
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  3. Nam Mai-Duy
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Correspondence to Prakorn Kittipoomwong.

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Kittipoomwong, P., See, H. & Mai-Duy, N. Dynamic simulation of non-spherical particulate suspensions. Rheol Acta 49, 597–606 (2010). https://doi.org/10.1007/s00397-009-0412-6

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  • DOI: https://doi.org/10.1007/s00397-009-0412-6

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